In today’s episode of Best of Build Show, Matt welcomes CJ Nielsen, master electrician and owner of CNC Electric, to break down the challenges of wiring a slab-on-grade home. Filmed on a complex California project, CJ explains why slab foundations demand a completely different electrical strategy compared to crawl spaces or raised floors. With no access below the slab and limited space above due to a flat roof, every conduit run must be carefully planned before the concrete is poured. CJ walks through using conduit, THHN wire, strategic transitions to Romex, and creative solutions like collection cans to maintain code compliance and flexibility. This episode is packed with practical insights for builders, electricians, and homeowners looking to better understand smart electrical planning in high-performance slab-on-grade construction.

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